@jwildeboer Generally house files can be put out with a fire hose just fine - while good luck putting out a huge LiCoO₂ battery (it's only common for shoddily made batteries to deflagrate, but even batteries from reputable manufacturers have been known for manufacturing defects and therefore are prone to catching fire).

Although, you can go with LiFePO₄ batteries instead, which are much safer, almost never catch fire and tend to burn gently rather than deflagrating.